from machine import Pin, PWM
import time

time.sleep(0.1) # Wait for USB to become ready
# Configura pinos/leds
pwm0 = PWM(Pin(13), freq=2000, duty_u16 = 32768)
# Define estado inicial

dir = 1 # direção

# Ciclo infinito
while True:
    for i in range(65535):
        if dir > 0:
            pwm0.duty_u16(i)
        else:
            pwm0.duty_u16(65535 - i)
        
        if i == 0 or i == 65534:
            dir *= -1